Siemens Trains Mid-Life Upgrading Project
SMRT Trains Ltd has awarded Singapore Rail Engineering (SRE) a contract for the mid-life upgrading of 19 Siemens C-651 trains. The scope of work includes the replacement of the propulsion system, air-conditioning system and auxiliary power system.
SRE will lead the procurement, system integration, production, testing and commissioning for this project.
The Siemens C-651 trains belong to the second generation of the four different types of train cars used on the SMRT network, operating on the North-South Line and the East-West Line since the mid-1990s."

but upon probing more details into it it says: In the area of transportation, Siemens secured a series of train refurbishment contracts from SMRT Corporation Ltd. These orders included bogie frame repairs for Singapore's first fleet of trains that has been operating since 1986, and several traction system upgrades for the fleet of Siemens trains that has been operating since 1994.

These details are conflicting with the one that says Toshiba will be retrofitting PMSM on the Siemens C651....
The list is there so that the thread can be used in future. Please ignore the list for now.Thread will be moved to happenings forum in due time.

Right now since the refurbishment is long overdue, I guees we can start the discussion.

I m guessing that the train will undergo Resig, Refurb and propulsion changeout together, which is scheduled for 2016. And I m guessing that would mean that refurbishment only starts after 151B enters service.

14. Trains Upgrade. SMRT has also embarked on progressive upgrades of its ageing first and second generation train fleet. Design studies will be completed this year, followed by the testing of a prototype in 2016 and the systematic upgrading of the train fleet thereafter. To ensure that we have sufficient trains available for service, the refurbishment work is being scheduled with the delivery of new trains. When completed in 2018, these upgrades will address train components such as doors and brakes that have been the primary cause of delays owing to train faults.